/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard;

import java.io.*;

/**
 * A <code>WordReader</code> that returns words from an argument list. Single arguments are split into individual words
 * if necessary.
 *
 * @author Eric Lafortune
 */
public class ArgumentWordReader extends WordReader {
    private final String[] arguments;

    private int index = 0;

    // /**
    // * Creates a new ArgumentWordReader for the given arguments.
    // */
    // public ArgumentWordReader(String[] arguments)
    // {
    // this(arguments, null);
    // }
    //
    //
    /**
     * Creates a new ArgumentWordReader for the given arguments, with the given base directory.
     */
    public ArgumentWordReader(String[] arguments, File baseDir) {
        super(baseDir);

        this.arguments = arguments;
    }

    // Implementations for WordReader.

    protected String nextLine() throws IOException {
        return index < arguments.length ? arguments[index++] : null;
    }

    protected String lineLocationDescription() {
        return "argument number " + index;
    }

    /**
     * Test application that prints out the individual words of the argument list.
     */
    public static void main(String[] args) {

        try {
            WordReader reader = new ArgumentWordReader(args, null);

            try {
                while (true) {
                    String word = reader.nextWord(false, false);
                    if (word == null)
                        System.exit(-1);

                    System.err.println("[" + word + "]");
                }
            } catch (Exception ex) {
                ex.printStackTrace();
            } finally {
                reader.close();
            }
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }
}
